feat(repair): repairIndex returns the per-family receipt and narrates its summary

repairIndex() now returns a RepairReport: one row per repair family
(orphaned containers, count rollups, VFS containment, metadata corruption,
write quarantine, each provider's invariant pass, degraded-read state) with
checked / healed counts and an explicit skip reason for anything not run —
no silent rows. A summary line narrates families checked and heals applied.

This is the receipts half of the graph-trust program's ask: a repair that
cannot show its work per store is a repair nobody can audit. Pinned: a
healthy store yields a complete zero-heal receipt with every family
accounted; a manufactured pre-8.3.1 ghost container appears in the receipt
as a counted heal. Additive: void-callers are unaffected.

src/types/brainy.types.ts

@@ -1192,6 +1192,27 @@ export interface RelateManyParams<T = any> {
 /**
  * Batch result
  */
+/**
+ * One family's row in a {@link RepairReport} — what repairIndex() checked,
+ * what it healed, and why anything was skipped. The receipts venue's graph
+ * trust program asked for: a repair that cannot show its work is a repair
+ * nobody can trust.
+ */
+export interface RepairFamilyReport {
+  family: string
+  checked: boolean
+  healed: number
+  detail?: string
+  skipped?: string
+}
+
+/** The full receipt returned by repairIndex(). */
+export interface RepairReport {
+  families: RepairFamilyReport[]
+  healedTotal: number
+  durationMs: number
+}
+
 export interface BatchResult<T = any> {
   successful: T[]            // Successfully processed items
   failed: Array<{           // Failed items with errors